Electric-lamp structure



July 14, 1925. 1,545,711"

J. R. TOWNSEND ELECTRI G LAMP STRUCTURE Filed Jan, 5, 1921 2 Sheets-Sheet l Mtn/214 ATTORNEY .Ju1y14,1`925. m5421711 J. R. TowNsEND AELECTRI C LAMP STRUCTURE Filed Jan. 5,' 1921 2 Sheets-Sheet 2 WITNEssEs:lNvENToR 4 ATTORNEY Patented July 14, 1925.

UNITED STATES PATENT oFElcE.

JOHN R. TOWNSEND, 0F SOUTH BEND, INDIANA, ASSIGNOB TO GEORGE CUTTER COI-PANY, A. CORPORATION OF INDIANA.

ELECTRIC-LAMP STRUCTURE.

Application med January s', 1921. serial no. 435,213.

To all whom it may concern.'

Beit known that I, JOHN R. TowNsENn, 'a citizen of the United States,and a resident of South Bend, in the county of St. Joseph and State ofIndiana, have invented a new and useful Improvement in Electric-LampStructures, of which the following is a specification.

My invention relates to lampy structures and particularly toelectric-lamp structures ofthe ost or pendant type.

One o ject o f my invention is to prov1de a lamp structure, of the aboveindicated character, that shall be simple and durable in construction,economical to manufacture, effective in operation and attractive inappearance.

Another object of my invention 1s vto provide a non-glare lamp structurethat shall be of substantially maximum light-- giving qualities for alamp of this type. A further object of my invention is to l provide alamp structure of the post or pendant type that shall be protectedagainst the weather, that shall embody a comb1- nationcover-and-reflector structure and that shall be constructed ofinterftting and interlocking parts to render the latter readilyaccessible andrenewable.`

In practicing my invention, ,I provide an ornamental amp structurehaving a sup-y porting base portion upon which a cylindrical or tubularVglobel is vertically disposed to support a combinationcover-andrellector structure at its upper end.

Locking rods, supported lvertically in the base portion, are providedwith operating means at their lower ends and with means, at their upperends', to secure the cover structure to the 'globe and to hold the coverand the-globe in position.

Rellectors of substantially cone shape are disposed in point-to-pointrelation above and below an incandescent |lamp that may be mounted atthe tip or apex of` one of the rellectors. The reflectors,.while ofsub-v in general, a base member 1 mounted on a .post or pedestal 2, alower reflector 3, mounted on the base member 1, a lamp 4, a globe 5,supported on the base member 1,

and a combination cover-andrelector structure 6 secured in position andladapted to hold the globe 5 in position by co-operation with locking orclampin rods 7 that are `mounted in the base mem r.-

The base member 1 has a top portion 8 of relatively great area on whicha lian 9 is formed to position the reflector 3. Tg2 latter is,preferably, constructed of relatively thin sheet material ofsubstantially conical .shape and may-be provided with an opening 10, atits apex, for the reception of the lamp 4 that 1s mounted in a usualinsulating socket 11. The socket 11 is adjustably mounted by means of abridging member 12 having c amp or clutch end portions 13 forco-operation with vertical rods 14 secured, as by screws 15, to aninternal flange 16 on the base member 1. An annular ring or seatmember17, of felt, or other suitable material, may be.provided on the portion8 around the base of the reflector 3 for the reception of the lobe 5that is, preferabl of plain cylin rical, or other tubular, ormthroughout'its length.

The structure 6 has a hollow'dome, or shell, cover portion 18,preferably constructed of relatively thin sheet metal,.to which adepending reflector member 19, of substantially inverted cone shape and,also, of relatively thin material, may be secured by a bolt 20. The bolt20 may be secured, at its lower'end 21, to the reflector 19, as bywelding, and, at its upper end, may be held in position by a nut 22.

The reliectors 3 and 19, while of substantially cone shape, have annularinversely-curved reflecting surfaces 23 of parabolic contour that aredeveloped from a common focal point, at which an incandescentlight-giving element 24 of the lamp 4 is disposed. The reliectors 3 and19 are disposed in point-to-point relation and coaxially aligned with alamp 4. The bulb of the lamp 4 may be frosted, enameled or otherwiseprovided with a translucent or lightfretarding band 25 to prevent theemission of certain light rays, such as would ordinarily be emitted indirections indicated by lines A, to, thereby, render the lamp non-glarinand to vdirect incident light rays, as in icated by lines B and C,toward the reflectors 19 and 3, respectively. The upper and lower edgesof the band 25 are disposed to limit the incident light rays so as tosubstantiallyl just cover the entire reflecting areas of t e reflectors19 and 3, as indicated by lines D and E. The reiectors 19 and 3 maybearranged to direct reflected light rays, as indicated b lines F and G,in any desired direction, epending on the area and hei ht of the conicalreflectors and their relation to the element 24.

A ring 26 of felt, or other material, may be disposed in a depressedannular groove 27, in the reflector member 19, for positioning thestructure 6l on the globe 5. The clamping rods 7, preferably ofrelatively small diameter to avoid obstructing the light rays, aresupported in screw-threaded relation to the portion 8 of the base member1 and are provided with handles 28 at their lower ends. The upper ends29 of the rods 7 are adapted to extend through openings 30 in thereflector member 19 and are rovided with laterally-extending clampingkeyor locking projections 31 adapted to bind the structure 6 4of the globe5 and the member 1 longitudinally together, when the rods 7 are turnedby means of the handles 28. The openings 30 and the projections 31 havesubstantially lock-and-key relation that, in certain angular positionsof the rods, permit the free mcuntln or dismounting of the structure 6and t at both lock and clamp the members together when the rods 7 areturned.

An eyelet 32, or other device, may be formed integral with the nut 22for 'convenience of mani ulation of the structure 6.

As shown in ig. 2, in which corresponding parts are deslgnated bycorresponding reference numerals, the structure is similar to the above'described structure, but is adapted as a pendant lamp in which it is'suspended, by the eyelet 32, from a hook 33 secured to one end of achannel beam or other device 34. rIhe latter may be secured, at itsother end, to a wall plate 35 that is adapted to be suitably positioned,as by bolts 36. Eye members or portions 37 and 38. on the members 34 and35, respectively, are adapted for the reception of a chain 39 toreinforce the beam 34.

In the place of the post 2 and the base member 1, of the structure shownin Fig. 1, a pressed-metal member 40, of substantially bowl shape andhaving an annular flange or projecting bead 41 fitted into a ring 42 maybe provided. The upper edge 43 of the member 40 takes the place of theflange 9 for ositioning the lower reflector 3 and the ro s 7, instead ofbeing turnable, may be rigidly secured, at their upper ends, to thestructure 6 and extend loosely through openings in the ring 42 for thereception of thumb nuts 44.

In this form, the opening 10 is provided in the u per reflector 19,instead of in the lower re ector 3, and the rods 14 are secured to themember 18, as -by socket members 45. Also, in the place of the bolt 20,a tube 46, having a threaded upper end co-operatin with the nut 22, an aflan ed lower en 47 may be provided. A. bri ging member 48 embraces, atits center, the flanged end 47 of the tube 46 and has its ends securedto the under side of the groove 27. This structure is occasioned byreason of the fact that the lamp, in this form, occupies part of thespace occu ied by the bolt 20 in the form shown in ig. 1. Con-ductingleads 49 vmay beyprovided with plug and socket members 50 and 51,respectively, adjacent to the upper'end of the tube 46 to permit thecircuit to be disconnected and the lamp structure lifted from the hook33.

While I have shown my invention in its referred forms, it is to beunderstood that 1t is susceptible of various modifications by thoseskilled in the art without departing from the spirit and scope thereofas set forth in the appended claims.

I claim as my invention 1. A lamp fixture comprising a light sourceprovided with a transparent portion for permittin free passage oflightprays upwardly an downwardl and an intermediate portion forrestrlcting the direct passa of horizontally projected light rays theretrough, la pair of curved refiectors arranged inversely to each otherdisposed above and below said light source for refleeting all suchdirect rays as pass through said trans arent portions of said lightsource, sai reectors being so shaped as to direct all reflected raysdownwardly in planes at a small angle to the horizontal.

2. A lamp xture comprising a base member, a globe and ,a canopy, meansfor ylocking sald `globe and canopy to said base comprising a rod, oneend of which is threaded in said base and the other end of which isprovided with a key member, means in said canopy for admitting said keymemthreaded at one end in said base, a. key on ber and means forrotating said rod to lock the other end of said, rod and means for saidbase, globe and canopy together. manually operating said rod. 10 3. Alamp fixture comprising abase mem- In testimony whereof, I have hereunto5 ber, a lamp and a globe supported thereon, subscribed my name this23rd day of Dec.,

a cover member provided with a key receiv- 1920. ing means disposed oversaid globe, a. rod JOHN R. TOWNSEND.

